The City of O’Fallon, Missouri has selected Reitz & Jens to provide... more

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Welcome to Reitz & Jens, Inc. We are a St. Louis based engineering firm that specializes in geotechnical, water resources, and environmental engineering, and construction quality control. Since our beginning in 1963, we have completed more than 10,000 building, site development, stormwater, floodplain management, and infrastructure projects throughout the Midwest.

Our clients include public agencies, engineers, architects, contractors, developers and private owners. They depend on us for quality advice and engineering design to solve a wide range of challenges in the natural and built environment. We pride ourselves on our ability to consistently blend new technologies and methodologies into our services, resulting in cost effective and often innovative solutions.

Our commitment is to provide a comprehensive scope of services in a timely and professional manner that meets or exceeds our client´s expectations and each project´s specific needs. Our services will consider the natural environment with our goal being sustainable development. It is our philosophy and experience that a thorough scope of engineering services, provided by a highly qualified consultant, will substantially reduce construction costs and improve the overall project quality, resulting in lower life cycle costs.

We have the experienced professionals, the technological capabilities and the personal commitment needed to deliver intelligent, pragmatic solutions on projects of all sizes and complexities, including yours.